define inner core...?
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Earth's inner core is the innermost geologic layer of the planet Earth. It is primarily a solid ball with a radius of about 1,220 km, which is about 20% of Earth's radius or 70% of the Moon's radius. There are no samples of Earth's core available for direct measurement, as there are for Earth's mantle. ✌
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Answer:
The solid marterial found in the centre of some planet at extremely high temperature and pressure ,distinct from the liquid outer core .
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